Door check and closer.



C. V. BERRY.

, DOOR CHECK AND CLOSER.

1.171.497. APPLICATION FILED JULY 12. 19H)- Patented Feb 15 2 SHEETS-SHEET I.

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Patented Feb. 15, 1916.

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M m w m M w m m m CHARLES V. BERRY, OF MANSFIELD, OHIO.

DOOR CHECK AND CLOSER.

Application filed July 12, 1915.

To'all whom it may concern:

Be it known that 1, CHARLES V. BERRY, a

citizen of the United States of America, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Door Checks and Closers, of which the following is a s ecification.

T his invention relates to certain new and useful improvements in door checks and closers of the pneumatic type, and it has for its rimary aim to provide a simple, durable not effective device of the above character whichis equally adaptable for right and lefthand doors without necessitating changes of structural nature.

A further object resides in an improved check and closer by which the closing action and movement of the door may be regulated easily.

A further object is to rovide means of closin a door by the com ined use of compresset air and a spring pressure and to afford facilities for excluding the air from the inner periphery of the spring.

A further object is to provide a door check and closer composed of a cylinder and a hollow piston rod that telescope each other and which are adapted to be extended and contracted with reference to each other by exerting a pressure or pull on the cylinder and piston rod simultaneously.

The invention further resides in the novel formation of the heads of the cylinders employed in the check, and the mounting of the spring.

These and other objects are attained from the construction hereinafter described, and claimed, the preferred embodiment of the invention being illustrated in the accompanying drawings, wherein like numerals of reference designate corresponding parts throughout and in which:

Figure 1 shows the invention, in perspective, as applied to a door which is shown in fragment; Fig. .2 is a top plan of the door check and closer as applied to the door, the relative position assumed b the parts when the door is opened being dotted in; Fig. 3 discloses the application of the im roved device to a screen door: Fl". 4 is a iorizontal section on line +-l of lg. 33, the dotted linesshowing the door opened; Fig. 5 illustrates the invention oer 86, the same being partially in section; l ig. 6 is an end elevation thereof; and Fig. 7 is a transverse sec- Specification of Letters Patent.

Patented Feb. 15, 1916.

Serial No. 39,241.

ition of the outer cylinder alone, taken about on line 77 of Fi 5.

More particularl the invention contemplates the use of an outer cylinder or casing l and an inner cylinder 2, the latter constitutin a hollow plunger rod on the inner end of wiich is threaded a plunger 3 snugly fittin the outer cylinder.

A lead 4 is threaded into an end of the cylinder 1 to oppose the plunger and is provided with a central opening 4' and a port 5 which latter receives a needle valve 5 to regulate the escape of air from the cylinder in advance of the plunger for govermng the relative movement between the cylinder and plunger and, consequently, in connection with a coil spring, the closing of the door. A boss 6 having an integral stem 7 extending through opening 4;, is detachably secured to head by a nut 8 threadedly engaging said stem 7.

"he periphery of boss 6 is threaded to secure and supportin place the adjacent end of a coiled spring 9 which extends into the inner cylinder 2 and has its op osite end similarly threaded on an integral oss 10 of head 11 which is in threaded engagement with the cylinder 2. Boss 10 is provided with an aperture to receive the reduced terminal of a closure rod 12 which extends substantially the length of cylinder 2, acts as a guide for the spring 9 and a closure for the inner periphery of the sprin Without this closure and guide rod whic i is formed preferably of wood, the air accumulates in the inner periphery of the spring and when -the plunger is moved in the outer cylinder,

the air spreads out and extends in the inner periphery of the sprin 9 to such an extent that it is too elastic antfthe result'is that the door rebounds continually and can not be closed with a non-vibratory, continuous and regular movement by the spring 4. When the closure rod is inserted within the periphery of the plunger, the air is substantially excluded therefrom and thereby substantially confined to the space between the head 4 and the plunger, the face of the plunger presenting a substantially air tight wall against the air in the cylinder as movement is imparted to the plunger, thereby eliminating the cushioning effect incident to the operation of an ordinary hollow plunger or when its central ortion is provided with an opening. Threaded on the inner end of cylinder 1 is a cap 13 formed with a central is provided with a series of short, lon tudinal grooves or by-passes ll to relieve 1e compressed air in advance of the cylinder when thedoor is almost closed. nection it will be noted that the plunger will be checked, on relieving the air pressure through grooves or by-passes 14, and the door will be gradually and continuously closed softly and quietly by the tension of the spring 9.

Each head 4 and 11 is formed with an integral and right angular hook 15 adapted to engage in an aperture of an angular bracket 16 which is secured on either-the door "17 or casing 18. The terminals of the hooks may be apertured to receive cotter-pins 19 for securing the device in place.

In practice, on opening the door both the inner and outer cylinders are extended at the same time, therebyequalizing the pull at both ends of the spring. Upon releasing the door the same will be closed by the contraction of the expanded spring 9. This action is controlled by the cushioning of the air between the advancing plunger 3 and head 4. When the plunger has moved over and uncovered the inner ends of the grooves or by primes 14, the confined air is relieved and the pressure equalized on both sides of the plunger. The tension of the spring being greatly relieved, the door will close gently 'and quietly as described. On regulating the needle valve 5, the closing of the door may be hastened or delayed, according to whether more or less air is allowed to esca e.

ll at is claimed is:

1. A door check comprising telescopic cylinders, a plunger on the inner cylinder operable in the outer cylinder, a head for the outer cylinder arranged in opposition to the plunger and provided with a central opening and a port, a regulating valve in the port of the head, a stemmed boss having its stem detachably secured in the opening of the head, a head on the outer end of the inner cylinder provided with an inwardly extending apertured boss, a coiled spring'having its ends secured to the bosses, the peripheries of the bosses being spirally grooved to receive the spring ends, a closure rod secured in the aperture of the second boss and arranged within the spring, the outer cylinder having its inner wall grooved for by-passes adjacent its head, and integral hooks on the heads. r

2. A door check comprising telescopic cylinders, a plunger on the inner cylinder operable in the outer cylinder, a head for the outer cylinder arranged in'opposition to the plunger and provided with acentral opening and a port, a regulating valve in the port I of the head, a stemmed'boss having its stem In this conopcnin to slidably receive the inner cylin-s-idetachably secured in the opening of the der. lhc opposite end of the outer cylinder head, a head on the outer end of the inner cylinder provided with an inwardly extend- '5 ing apcrtured boss, a coiled spring having its ends secured to the bosses, a closure guide rod fitted in the apertured boss, the peripheries of the bosses being spirally grooved to receive the spring ends, and integral hooks formed on the heads adapted to engage in brackets on relatively movable elements whereby an equal pull is exerted on the outer and inner telescopic members at the same time, when movement is imparted to the door.

3. A door check comprising a cylinder, a

telescopic member, a plunger on the latter, a head for the cylinder, a boss on the head, a closure rod attached to the telescopic member, and a coiled spring secured to the boss and normally tending to hold the telescopic member tolescoped, said boss being spirally grooved to receive the coils of the spring end whereby equal pull is exerted on the cylinder and the plunger at the same time.

4. A door check comprising an outer cylinder in combination with an inner cylinder adapted to telescope therewith, a plunger closed by the inner cylinder, a spring inclosed within the inner cylinder, a closure rod fitted within the inner periphery of the spring, grooves formed in the outer cylinder adjacent to one end thereol and adapted to provide by-passes for air in the outer cylinder.

5. A door check comprising telescopic cylinders, a head for one cylinder provided with an aperture boss, a. closure rod disposed in the aperture of the boss, and a coiled spring arranged within the cylinders to normally hold the cylinders telescoped.

6. In a door check and closer, in combinution, a large cylinder, a head for said cylinder provided with an integral hook, spirally threaded fastening means carried by said cylinder, a hollow piston rod carrying'a plunger which slidably fits the large cylinder, a head carrying a spirally threaded fastening means and a hook on the head, the same being secured to the piston rod, a coil spring fitted within the hollow piston rod and attached to the spirally threaded fastening means, by passes formed in the inner periphery of the large cylinder, a closure and guide rod fitted to the inner periphery of the coil spring. I

7. in a door check and closer, in combination, a large cylinder, a head for said cylinder provided with an integral hook, spirally threaded fastening means carried by said cylinder, a hollow piston rod carrvmg a plunger which slidably fits the large cylinder, a coil spring fitted within the hollow piston rod and attached to the spirally threaded fastening means, by-passes formed in the inner periphery of the large cylinder,

a closure and guide rod fitted to the inner periphery of the coil spring, means to support the check and closing rod to provide for an equal pull and pressure upon the cylinder and piston rod simultaneously, and an adjustable relief valve for regulating the escape of the compressed air.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES V. BERRY.

Witnesses:

JOHN H. Coss,

Lem. Rrronm.

Copies 0! thin potent me be obtdned for five cent: nob, by nddroulng the Commissioner of Patents, Wellington, 20. 0." 

